EP0501161B1 - Dispositif pour l'introduction de gaz dans les eaux usées - Google Patents

Dispositif pour l'introduction de gaz dans les eaux usées Download PDF

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Publication number
EP0501161B1
EP0501161B1 EP19920101507 EP92101507A EP0501161B1 EP 0501161 B1 EP0501161 B1 EP 0501161B1 EP 19920101507 EP19920101507 EP 19920101507 EP 92101507 A EP92101507 A EP 92101507A EP 0501161 B1 EP0501161 B1 EP 0501161B1
Authority
EP
European Patent Office
Prior art keywords
axis
gas outlet
loop
angle
loops
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP19920101507
Other languages
German (de)
English (en)
Other versions
EP0501161A1 (fr
Inventor
Wilhelm Peter Doppelfeld
Werner Dr. Pieper
Wilhelm Giechau
Hilmar Dr. Roszinski
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hoechst AG
Original Assignee
Hoechst AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hoechst AG filed Critical Hoechst AG
Priority to AT9292101507T priority Critical patent/ATE104928T1/de
Publication of EP0501161A1 publication Critical patent/EP0501161A1/fr
Application granted granted Critical
Publication of EP0501161B1 publication Critical patent/EP0501161B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/02—Aerobic processes
    • C02F3/12—Activated sludge processes
    • C02F3/20—Activated sludge processes using diffusers
    • C02F3/205—Moving, e.g. rotary, diffusers; Stationary diffusers with moving, e.g. rotary, distributors
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/02—Aerobic processes
    • C02F3/12—Activated sludge processes
    • C02F3/20—Activated sludge processes using diffusers
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00—Technologies for wastewater treatment
    • Y02W10/10—Biological treatment of water, waste water, or sewage

Definitions

  • the present invention relates to a device for the gassing of wastewater in a gassing basin with horizontally arranged fumigation boxes arranged parallel to one another and at a distance from one another, in the upper sides of which gas outlet openings are arranged and the lower sides of which are open.
  • DE-C-2 345 405 describes a gassing device in which oxygen-containing gas is fed to the gassing basin at a lower depth with lower pressures and simply designed gassing boxes.
  • the invention is therefore based on the object of designing the tried and tested device for introducing oxygen-containing gas through fumigation boxes in such a way that there is no longer any obstruction of the air outlet due to mineral precipitation and the availability of the system thus remains guaranteed over long periods of time.
  • movable rotating bodies are arranged in the gas outlet openings 13 of the gassing boxes 14 and the gas outlet openings 13 each have, in a known manner, a central countersink 12 enclosing an angle ⁇ from below and the remaining wall thickness 15 of the gas outlet opening 13 each countersink 12 is 0.5 to 2 mm.
  • the rotating body with two loops consists of the head part 1, which is formed by the loops 4 and 4 '.
  • the head part 1 is connected to the foot part 3 via the rods 5 and 5 ', which form the neck part 2 with the axis 7.
  • the foot part 3 consists of the brackets 6 and 6 '.
  • the brackets 6 and 6 ' form an angle ⁇ on the neck part.
  • the loop 4 ' is reduced to a rod 9.
  • This rotating body is bent into its final shape on site.
  • the rotary body consists of the rods 5 and 10 and the loop 6 ′′.
  • the rod 5 After the rod 5 has been passed through from below through the gas outlet opening 13, the rod 5 is bent into the loop 4 and rod 9.
  • the loop 4 is arranged on the rod 5 as in the case of the rotating body with two loops at an angle ⁇ ; the rod 9 is perpendicular to the rod 5.
  • the loop 6 ′′ has an axis 11.
  • the surface formed in the loop is inclined at an angle ⁇ around the axis 11.
  • the loop 6 ′′ and the rod 10 form an angle ⁇ .
  • Fig. 5 shows the gas outlet opening 13 of the gassing box known from DE-C-2 345 405.
  • the gas outlet opening 13 is drilled, which is enlarged from below by the countersink with the angle ⁇ .
  • the remaining wall thickness 15 remains in the gas outlet opening 13.
  • the wastewater is treated in three stages in the central wastewater treatment plant of a chemical industry.
  • Mechanical and chemical pre-treatment with lime produces pre-cleaned wastewater, which is used to biodegrade water fiber from an activated sludge plant consisting of 6 gassing tanks with a total tank volume of 7500 m3 is fed.
  • the average wastewater throughput is 1000 m3 / h.
  • the fumigation pools are equipped with fumigation boxes and designed for a removal of 12 t / d BOD. Via 4 fans, 30000 m3 / h air are blown into the system in 66 fumigation boxes per pool 1 m below the water surface.
  • the fumigation boxes consist of U-shaped hollow bodies made of plastic with the opening facing downwards. So much air is metered into this hollow body that the air can only emerge in fine bubbles from the gas outlet openings of the gassing boxes through 5 mm holes.
  • the performance of the system was maintained by mechanical and chemical cleaning of the gassing boxes in a 3-day cycle.
  • the respective basin had to be decommissioned and the water level had to be lowered below the gassing device, so that no water fiber was broken down in this part of the wastewater treatment.
  • the gas outlet openings of individual gassing boxes are equipped at selected locations in a gassing basin with rotating bodies according to the invention.
  • 2 boxes are located directly at the point where wastewater and return sludge flow together and 2 boxes are at the end of the fumigation basin.
  • all fumigation boxes equipped with rotating bodies are fully operational.
  • the gas outlet openings are free even in the heavily loaded inlet area.
  • the fumigation boxes were encrusted with mineral deposits. Circular surfaces around the gas outlet openings are free of deposits. Only the traces of the rotating bodies are visible.
  • the gassing box equipped with rotating bodies at the outlet of the activated sludge tank shows no incrustations due to mineral precipitation in the area of the running surfaces of the rotating bodies and the edges of the gas outlet openings even after 6 months of operation.
  • the rotating body used had two loops and the following dimensions:

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Microbiology (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Accessories For Mixers (AREA)
  • Processing Of Solid Wastes (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Aeration Devices For Treatment Of Activated Polluted Sludge (AREA)
  • Treating Waste Gases (AREA)

Claims (16)

  1. Appareil pour la gazéification d'eaux usées dans un bassin de gazéification comprenant des caissons de gazéification reposant horizontalement agencés parallèlement les uns à côté des autres et à distance les uns des autres, avec des ouvertures de sortie de gaz ménagées dans leurs faces supérieures et dont les faces inférieures sont ouvertes, les ouvertures de sortie des gaz présentant chacune et de manière connue un renfoncement central depuis le dessous qui inclut un angle α, et l'épaisseur de la paroi résiduelle restante de l'ouverture de sortie des gaz de chaque dépression étant égale à 0,5 à 2 mm, caractérisé en ce que des corps rotatifs mobiles sont agencés dans les ouvertures de sortie des gaz (13) des caissons de gazéification (14).
  2. Installation selon la revendication 1, caractérisée en ce que le corps rotatif est réalisé en métal ou en matière plastique.
  3. Installation selon l'une ou l'autre des revendications 1 et 2, caractérisée en ce que le corps rotatif est constitué par une partie de tête (1) et une partie de pied (3), lesquelles sont reliées au moyen d'une partie de col (2), la partie de tête étant constituée par deux crochets aplatis (4) et (4'), l'axe (8) des crochets (4) et (4') étant perpendiculaire à l'axe (7) de la partie de col (2), et la surface des crochets (4) et (4') étant inclinée autour de l'axe (8) d'un angle β, et la partie de pied (3) étant constituée de deux boucles (6) et (6') qui sont reliées à la partie de col (2) et qui forment l'une avec l'autre un angle γ au niveau de la partie de col (2).
  4. Installation selon l'une quelconque des revendications 1 à 3, caractérisée en ce que l'angle β est de 30 à 60° en particulier 45°.
  5. Installation selon l'une quelconque des revendications 1 à 4, caractérisée en ce que les angles γ et α sont égaux et supérieurs à 90°, mais inférieurs à 180°, de préférence entre 100 et 130°, en particulier égaux à 120°.
  6. Installation selon l'une quelconque des revendications 1 à 5, caractérisée en ce que le corps rotatif peut être déplacé dans la condition de repos sur 5 à 20mm, en particulier 15mm, dans l'ouverture de sortie des gaz (13) en direction de l'axe (7) de la partie de col (2).
  7. Installation selon l'une quelconque des revendications 1 à 6, caractérisée en ce que le corps rotatif est fabriqué en fil avec un diamètre de 0,5 à 5 mm, en particulier 1 à 1,5 mm.
  8. Installation selon l'une quelconque des revendications précédentes 1 à 7, caractérisée en ce que le corps rotatif est fabriqué à partir de bandes de tôle.
  9. Installation selon la revendication 8, caractérisée en ce que la bande de tôle a une largeur de 0,5 à 5 mm en particulier de 1 à 2 mn, et une épaisseur de 0,1 à 0,5, en particulier de 0,2 à 0,3 mm.
  10. Installation selon l'une quelconque des revendications précédentes 1 à 9, caractérisée en ce que le crochet (4') est réalisé sous la forme d'une tige (9) qui est agencée perpendiculairement à l'axe (7) de la partie de col (2).
  11. Installation selon l'une quelconque des revendications précédentes 1 à 10, caractérisée en ce que la partie de pied (3) est formée par un crochet aplati (6'') et une tige (10).
  12. Installation selon la revendication 11, caractérisée en ce que le crochet (6'') et la tige (10) forment un angle γ.
  13. Installation selon l'une quelconque des revendications 1 à 9, caractérisée en ce que les projections, en direction de l'axe (7), des boucles (6) et (6') sont tournées de 90° par rapport à l'axe (8).
  14. Installation selon l'une quelconque des revendications 1 à 13, caractérisée en ce que le crochet (6'') possède un axe (11), et en ce que la surface formée par le crochet (6'') est tournée de l'angle β autour de l'axe (11).
  15. Installation selon l'une quelconque des revendications précédentes, caractérisée en ce que les angles d'inclinaison β des crochets (4) et (4') sont orientés dans des directions opposées autour de l'axe (8).
  16. Installation selon l'une quelconque des revendications précédentes, caractérisée en ce que les angles d'inclinaison β du crochet (4) autour de l'axe (8) et du crochet (6'') autour de l'axe (11) sont orientés dans des directions opposées.
EP19920101507 1991-03-01 1992-01-30 Dispositif pour l'introduction de gaz dans les eaux usées Expired - Lifetime EP0501161B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT9292101507T ATE104928T1 (de) 1991-03-01 1992-01-30 Vorrichtung zur begasung von abwaessern.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4106527A DE4106527A1 (de) 1991-03-01 1991-03-01 Vorrichtung zur begasung von abwaessern
DE4106527 1991-03-01

Publications (2)

Publication Number Publication Date
EP0501161A1 EP0501161A1 (fr) 1992-09-02
EP0501161B1 true EP0501161B1 (fr) 1994-04-27

Family

ID=6426228

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19920101507 Expired - Lifetime EP0501161B1 (fr) 1991-03-01 1992-01-30 Dispositif pour l'introduction de gaz dans les eaux usées

Country Status (5)

Country Link
US (1) US5213717A (fr)
EP (1) EP0501161B1 (fr)
JP (1) JPH0615291A (fr)
AT (1) ATE104928T1 (fr)
DE (2) DE4106527A1 (fr)

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2803826A (en) * 1955-10-24 1957-08-27 Temple Safety On Sea Mfg Co In Fire fighting suits
US3490752A (en) * 1966-09-02 1970-01-20 Martin Danjes Aeration device for sewage plants with biological purification
GB1231447A (fr) * 1968-12-09 1971-05-12
US3567124A (en) * 1968-12-23 1971-03-02 Adrian L Jones Sprinkler unit
US3759494A (en) * 1971-07-21 1973-09-18 L Axelrod Valve plate of column still
US3747901A (en) * 1972-04-21 1973-07-24 G Coverston Carburetor apparatus
US3953554A (en) * 1973-07-11 1976-04-27 Ashland Vault Incorporated Diffuser for aeration systems
CH578888A5 (fr) * 1973-09-08 1976-08-31 Hoechst Ag
AT330688B (de) * 1973-11-13 1976-07-12 Georg Hamburger & Co K G Duse zum verteilen von gasen in flussigkeiten, insbesondere abwasser
US4272461A (en) * 1979-03-06 1981-06-09 Franklin Jr Grover C Apparatus for mixing gases with liquids
US4925575A (en) * 1989-01-09 1990-05-15 Just Gerard A System for separating phases of a liquid stream

Also Published As

Publication number Publication date
US5213717A (en) 1993-05-25
JPH0615291A (ja) 1994-01-25
ATE104928T1 (de) 1994-05-15
EP0501161A1 (fr) 1992-09-02
DE59200131D1 (de) 1994-06-01
DE4106527A1 (de) 1992-09-03

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